package com.cmy.servlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class HelloServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        this.getInitParameter();  初始化参数
//        this.getServletConfig();  Servlet配置
//        this.getServletContext(); Servlet上下文
        ServletContext ctx = this.getServletContext();

        String username = "hello";//数据
        ctx.setAttribute("username",username);//将一个数据保存在ServletContext中(键值对)

        System.out.println("OK!!!");
  }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp);
    }
}

    